1 List the various stages in your experiment that could lead to inaccuracy in your final results. How would these affect the overall value you obtained for the enthalpy of combustion? Which would have the largest impact on the overall results?

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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For consideration
1
List the various stages in your experiment that could lead to
inaccuracy in your final results. How would these affect the
overall value you obtained for the enthalpy of combustion?
Which would have the largest impact on the overall results?
2
If the next member of the homologous series of alcohols
were used (butanol), what would you expect the enthalpy of
combustion to be?
3
Why would you expect a (roughly) similar increase in
enthalpy of combustion between members of a homologous
series?
Transcribed Image Text:For consideration 1 List the various stages in your experiment that could lead to inaccuracy in your final results. How would these affect the overall value you obtained for the enthalpy of combustion? Which would have the largest impact on the overall results? 2 If the next member of the homologous series of alcohols were used (butanol), what would you expect the enthalpy of combustion to be? 3 Why would you expect a (roughly) similar increase in enthalpy of combustion between members of a homologous series?
Aim
To calculate the enthalpy of combustion of two fuels: ethanol and
propanol
Introduction
A fuel is burnt and as much of the energy released as possible is
transferred to water by heating.
Using the fact that 4.18 J of energy are required to raise 1 g of water
by 1 °C, the amount of energy given out by the fuel can be
calculated. This can then be converted to the amount of energy
given out per mole in order to calculate the enthalpy change of
combustion of the fuel.
Transcribed Image Text:Aim To calculate the enthalpy of combustion of two fuels: ethanol and propanol Introduction A fuel is burnt and as much of the energy released as possible is transferred to water by heating. Using the fact that 4.18 J of energy are required to raise 1 g of water by 1 °C, the amount of energy given out by the fuel can be calculated. This can then be converted to the amount of energy given out per mole in order to calculate the enthalpy change of combustion of the fuel.
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